Great stay! Super clean and cozy unit. You can get a better feel for how a local lives. A bit far from the center of action, but BTS is readily accessible after a 50 Baht Cab Ride to the nearest station. However, you may have to negotiate with cab drivers from time-to-time and must be prepared to pay the tourist tax. Don't let it get to you, just think about it as part of your Bangkok experience.
I highly recommend Tatiya's place, specifically for those okay being far away from the ruckus that is Khaosan. Cabs are readily available to get to wherever you need to. For me, Tatiya's place offered a nice sanctuary away from Bangkok's hustle and bustle. But if you want many big nights of partying, you might want to consider staying closer to the center.